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Note 3 - Revenue Recognition (Tables)

3 Months Ended

Jun. 30, 2022

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Three Months Ended June 30, 2022
Product Line:		Grid				Wind
Equipment and systems		$	18,077			$	1,973
Services and technology development			1,753				877
Total		$	19,829			$	2,850
Region:
Americas		$	16,902				—
Asia Pacific			2,677				2,850
EMEA			250				—
Total		$	19,829			$	2,850

		Three Months Ended June 30, 2021
Product Line:		Grid				Wind
Equipment and systems		$	21,159			$	1,033
Services and technology development			2,342				886
Total		$	23,501			$	1,919
Region:
Americas		$	22,645			$	19
Asia Pacific			598				1,870
EMEA			258				30
Total		$	23,501			$	1,919

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

		Unbilled Accounts Receivable				Deferred Program Costs				Contract Liabilities
Beginning balance as of March 31, 2022		$	6,492			$	858			$	30,034
Increases for costs incurred to fulfill performance obligations			—				406
Increase (decrease) due to customer billings			(4,710	)							17,852
Decrease due to cost recognition on completed performance obligations			—				(365	)
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations			2,128								(13,737	)
Other changes and FX impact			—				(25	)			(394	)
Ending balance as of June 30, 2022		$	3,910			$	874			$	33,755

		Unbilled Accounts Receivable				Deferred Program Costs				Contract Liabilities
Beginning balance as of March 31, 2021		$	5,765			$	978			$	21,258
Increases for costs incurred to fulfill performance obligations			—				1,434				—
Increase for balance acquired			—				634				10,048
Increase (decrease) due to customer billings			(1,564	)			—				21,425
Decrease due to cost recognition on completed performance obligations			—				(2,041	)			—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations			4,360				—				(24,355	)
Other changes and FX impact			—				3				246
Ending balance as of June 30, 2021		$	8,561			$	1,008			$	28,622

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

			Three Months Ended
	Reportable		June 30,
	Segment		2022				2021
Micron Technology	Grid			<10	%			21	%
Nextera Energy Resources	Grid			—				12	%
SGL Carbon LLC	Grid			10	%			<10	%
Ascend Performance Materials Ops LLC	Grid			<10	%			10	%

X

- Definition

Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045

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